Thkeshing-machiwe



J. R. MFFITT.

Thrashing Machine, No. 19,865s .Patented Aril 6, 1858,

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JNO. R. MOFFTT, OF ST. LOUIS, MISSOUR.

THnEsHiive-MAGHINE.

Speciication of Letters Patent No. 19,865, dated April 6, 1858.

To all whom it may concern: experienced from gearing becoming in- Be it known that l, JOHN R. Morri'r'r, of operative in consequence of the winding the city of St. Louis, State of Missouri, of the machine which its -great weight have invented new and useful lmproverenders impossible to avoid when set upon ments in Threshing-Machines; and l hereby uneven ground. The arms h., h., resting 50 declare the ollowing to be a full and exact upon the side plate in which the cylinder.L Y

' is journaled prevent the sinking of the :trame and hold the gearing firmly in position with respect to the cylinder. The bolts must be so disposed that when the machine 55 is strained out of form they will not be subjected to such stress as would result in loosening them or breaking the frame.

The following are the objects and advantages of the described method of adjusting the 60 concave: lt is generally necessary that the front end of the concave should vary but little in distance from the cylinder, in order that the grain may pass in from the feed board at equal speed. Experience proves 65 the most advantageous position for the teeth on the concave to be under 'the center of the cylinder, and the distance of these teeth from the cylinder must be varied in accordance with the kinds and conditions of 71 grain to be threshed. Thus with some varieties of grain and when it is dry, too great proximity of the teeth will inevitably result in breaking a portion of the grain, while under other circumstances the grain 1 cannot be eiiectually threshed without setting the covcave teeth nearer-the cylinder'I or increasing their number at the expense of power.

l claim as new and of my invention herein.

The' construction and arrangement of the metallic gearing-frame H, provided with arms h, h, and attached to the machine substantially as explained.

ln testimony whereof, l hereunto set my yhand to this specification.

J. R. MOFFITT.

description of the same, reference being had to the accompanying drawings, makc ing part of this specification.

rhe present improvement consists in a eculiar construction and arrangement o the frame in which runs the multiplying gearing which imparts motion to the threshing cylinder; whereby the said gearing is maintained in position for effective action in any condition of the machine.

In the accompanying drawing Figure 1 is an elevation of the left side of the machine with a portion of the side plate removed to exhibit the cylinder and ad'iust-able concave. Fig. 2 is a top view with the upper part o the elevator removed. Fig. 3 is an elevation of the right side. Fig. l is a detached perspective view of the metallic gearingframe and the portion of the machine to which it is attached.

A, is the toothed cylinder receiving motion by means of multiplying gearing Gr, mounted in a metallic frame H, which rests 3o on the side plate by arms h, h, and is attached to the machine by means ot bolts z', i, 2', which are at their front ends hinged to the respective side plates by bolts c, an at their rear ends are supported by screw bolts d, passing through projections c, on the concave plates and engaging in lugs f, on the side plates, or they may pass through the lugs f, and be confined by nuts.

'1 v The separating apparatus being similar Y l 40 to that described in my patents of Nov. 30th,

' 1852, and Dec. lst, 1857, requires no specic description here,

The benefits of the described construction and arrangement of the metallic gearing-frame H, refer to a ditliculty commonly Witnesses:

Oor. KNIGHT, JOHNS HoLLiNesnzeAn. 

